Smart thermostat



FIG. 1 is an upper front perspective view of a smart thermostat, showingmy new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a right side elevation view thereof.

The portions of the smart thermostat shown in broken lines form no partof the claimed design.

CLAIM The ornamental design for a smart thermostat, as shown anddescribed.